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Full text of "The manufacture and properties of iron and steel"

24:2
METALLURGY OF IRON AND STEEL.
This will be shown by Table XIII-F, which gives the results obtained by testing the edge and the middle of universal-mill plates which were made from slabs from the same ingot. A record was kept of the position of each slab, and the tests were from the top end of each plate. The list gives the same information as if the whole ingot had been rolled into one plate and cut up for testing. The segregation in the central axis is shown by a slightly higher content of metalloids, and a higher tensile strength", but the variations between parts of the same plate, and the variations between different plates, are less than shown in Table XIII-E for plates rolled directly from ingots.
The usual way of testing is to take a strip from a corner of the
TABLE XIII-F. Universal Mill Plates, Rolled from Slabs.
NOTE.—Plate No. 1 represents the hottom of the Ingot, the others being numbered consecutively toward the top.
Heat No.	No- of plate.	Fart of plate.	Elastic limit; pounds per square inch.	Ultimate strength; pounds per square inch.	Elongation in 8 inches; per cent.	Reduction of area; per cent.	Composition; per cent.		
							P.	S.	Mn.
2005 Acid.	1	Edge, Middle,	83030 85880	64040 65000	29.50 27.50	69.1 61.8	.066 -.074	.040 .040	.80 88
	2	Edge, Middle,	83240 84870	54000 65540	29.50 29,00	68.8 61.3	.068 .074	.044 08»	86 .87
	8	Edge, Middle,	82570 84670	63220 65420	81.00 80.50	62.5 62,1	.068 .074	.040 040	.87 .86
	4	Edge, Middle,	83430 85240	68400 66450	81.25 80.50	60.6 68.4	.054 ,074	•040 .045	.87 .85
	5	Edge, Middle,	83270 84600	64080 66840	8075 83.00	60.7 67.1	.080 .088	.047 052	.80 ,85
	6	Edge, Middle,	83520 85090	64380 67380	81.00. 29.26	57.3 56.7	.077 .087	.05C .048	.87 .88
	7	Edge, Middle.	83150 85110	64120 68180	2925 2625	59.5 56.2	.071 .088	.046 060	.88 .86
OT85 Baaio.	1	Edge, Middle,	34050 81900	55860 64440	29.60 81.50	63.2 64.2	.007 .007	.088 .082	45 .48
	2	Edge, Middle,	83580. 82460	65350 68780	80.50 81.75	592 63.6	.008 .007	.045 .081	.45 48
	3	Edge, Middle.	83210 88170	66340 55240	2875 82.50	67.8. 63.1	.007 .008	.040 .085	.45 .48
	4	Edge, Middle,	83580 82550	56580 66020	80.50 80.25	6S.6 60.4	.007 .008	.080 086	.45 .48
	5   '	Edge, Middle,	83580 82800	56340 57240	28.75 80.00	58.2 684	007 .008	.042 .040	.44 ,4*